Changes : Fix section for API additions

Author: johnhaddon

Changes

@@ -1,14 +1,18 @@
 10.3.7.0 (relative to 10.3.6.1)
 ========
 
+Improvements
+------------
+
+- IECoreGL :
+  - Buffer : Added `buffer()` method, which returns the OpenGL buffer handle (#1272).
+  - Primitive : Added `getVertexBuffer()` and `getVertexCount()` methods (#1272).
+
 Fixes
 -----
 
 - IECoreUSD :
   - SceneCacheFileFormat : Added support for `IECore::Object` references when determining primvar type (#1280).
-- IECoreGL :
-  - Buffer : Added `buffer()` method, which returns the OpenGL buffer handle (#1272).
-  - Primitive : Added `getVertexBuffer()` and `getVertexCount()` methods (#1272).
 
 10.3.6.1 (relative to 10.3.6.0)
 ========